I always find it interesting when people say 'it's already at ATH, how higher can it go?' - the answer is, a lot higher if the market has demand for it.
Back in March 2020, consider someone bought
$QQQ at $190 and sold it when it hit $280. They would have made about 47% in 4 months.
$QQQ went on to go to $407, which could have been a return 114% instead. Likewise, the
$SPY rally has continued far higher than anticipated.
Listen to the market, listen to the charts.